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Control of Traffic Signal Phases

  • US 20110304476A1
  • Filed: 06/15/2010
  • Published: 12/15/2011
  • Est. Priority Date: 06/15/2010
  • Status: Active Grant
First Claim
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1. A method for controlling a traffic signal phase at one or more intersections, respectively, comprising:

  • configuring a control system at an intersection to operate in one of a first mode or a second mode;

    while operating the controller in the first mode, in response to a transit priority signal received by the control system from a vehicle assigned transit priority, extending a green phase of the traffic signal in favor of the vehicle assigned transit priority; and

    while operating the control system in the second mode, in response to a transit priority signal received by the control system from the vehicle assigned transit priority, preempting a current non-green phase of the traffic signal to a green phase in favor of the vehicle assigned transit priority.

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